MX29LV640BXBC-90 MCNIX [Macronix International], MX29LV640BXBC-90 Datasheet - Page 53

• Manufacturer Part Number: MX29LV640BXBC-90
• Description: 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: MCNIX [Macronix International]

Fig 17. CHIP UNPROTECT FLOWCHART (A9, OE Control)
P/N:PM0920
Sector Addr
Increment
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
No
Set Up First Sector Addr
Read Data from Device
Write Reset Command
Remove VID from A9
Activate WE Pulse
Set OE=CE=VIL
Protect All Sectors
Time Out 15ms
Set OE=A9=VID
CE=VIL,A6=1
All sectors have
A9=VID,A1=1
been verified?
PLSCNT=1
Chip Unprotect
Data=00H?
START
Complete
53
Yes
Yes
No
MX29LV640T/B
PLSCNT=1000?
Device Failed
Increment
PLSCNT
Yes
No
REV. 1.2, NOV. 05, 2003